code 9009 executing pre build command line VS2008

I have the following 2 lines in my "pre-build event command line":

cd "$(ProjectDir)"
xsd/c GenConfig.xsd /namespace:AppMetaData

These 2 commands work fine in VS2003, but in VS2008 I get the following

The command "cd "C:\working barrel\PMSA\Domain\AppMetaData\"
xsd/c GenConfig.xsd /namespace:AppMetaData
" exited with code 9009.

Any idea why this no longer works in VS2008?

Thanks in advance.